add http support

Author: sukunrt

error-codes/README.md

@@ -92,5 +92,14 @@ as the latest WebTransport draft,
 allows for a 4-byte error code to be sent on stream resets, we will introduce
 error codes over WebTransport later.
 
+### HTTP
+Protocols that work over http MUST use the response header `Libp2p-Error-Code` to send the error code. The grammar for the field is similar to `Content-Length`
+```
+Libp2p-Error-Code: 1*DIGIT
+```
+
 ### Multistream Select
 Multistream-Select is used to negotiate Security protocol for TCP connections before a stream muxer has been selected. There's only one error code defined for such cases, `PROTOCOL_NEGOTIATION_FAILED`. To encode this error, send the string `101` prefixed with the length and close the TCP connection.  
+
+
+

error-codes/libp2p-error-codes.md

@@ -21,10 +21,10 @@
 | NO_ERROR | 0 | No reason provided for disconnection. This is equivalent to resetting a stream without any error code. | 
 | Reserved For Transport | 1 - 100 | Reserved for transport level error codes. | 
 | PROTOCOL_NEGOTIATION_FAILED | 101 | Rejected because we couldn't negotiate a protocol. Used by multistream select|
-| RESOURCE_LIMIT_EXCEEDED | 102 | Connection rejected because we ran into a resource limit. Implementations MAY retry with a backoff |
+| RESOURCE_LIMIT_EXCEEDED | 102 | Stream rejected because we ran into a resource limit. Implementations MAY retry with a backoff |
 | RATE_LIMITED | 103 | Rejected because the connection was rate limited. Implementations MAY retry with a backoff |
 | PROTOCOL_VIOLATION | 104 | Rejected because the stream protocol was violated. MAY be used interchangably with `BAD_REQUEST` | 
 | SUPPLANTED | 105 | Resetted because a better transport is available for the stream |
-| GARBAGE_COLLECTED | 106 | Connection was garbage collected |
+| GARBAGE_COLLECTED | 106 | Idle Stream was garbage collected |
 | SHUTDOWN | 107 | The node is shutting down |
 | GATED | 108 | The stream was gated. Most likely the IP / node is blacklisted. |